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Hi,guys:

I want to use c to implement a pipe. For example:

ps auxwww | grep fred | more


I forked three child processes. Each is responsible for each command, and pipe to next one.
...

Hi, guys:

I am writing my own shell using c. I meet with two problems.

First, when I use tcsetpgrp system call to move a background job to foreground, when this job finishes, my shell program...

Thanks. Is "terminal_fd " built in ? Or do I need to define "terminal_fd"? Is it file descriptor of stdin?

Hi, guys:

I am working on my shell using c. How can I use pipe to implement the following?

ls -l 1>> | grep hellp 1<< 2>> | less 2<<

(the output of ls goes to grep, and the output of grep...

Hi, guys:

I am working on my own shell using c. When I put a process into the background, how can I put it back to the foreground using tcsetpgrp?

Thanks

Hi, guys:

I want to write my own shell using C. I am confused about the usage of I/O multiplex. Does anyone know some examples or explain it to me ?


Thanks so much

Thanks for your reply. But I want the child process can run in background, not in foreground

Hi, guys:

I am working on my own shell using c. When I fork a child process and make it run in background. I hope when this process exits, my shell can print a line such as "this process exits"....